DIY JAR LID with display

DIY JAR LID with display

Why buy a ready-made device that measures temperature and humidity when you can make your own.
 

Temperature and humidity are measured by the DHT 11 sensor. The Seeed XIAO RP2040 microcontroller reads this data and then displays it on a 0.91-inch display, all powered by a 3.7V battery.

List of components:

• temperature and humidity sensor - DHT 11
• microcontroller - Seeed XIAO RP2040
• display - 0.91" 128x32 OLED display
• battery - GeB LiPol Baterie 104050 2500mAh 3.7V JST-PH 2.0
• connection - breadboard ZY-170, wires

Connections (pins numbered from this picture):

• DHT 11
  • DATA → P3
  • VCC   → 3V3
  • GND  → GND
• DISPLAY
  • SDA → P6
  • SCK → P7
  • VCC → 3V3
  • GND → GND
• Battery
  • + → 5V
  • -  → GND

Dowland code and that upload the code by this tutorial.

Modelled in Fusion 360.

Type of lid: TO-82